![]() ![]() ![]() The HLB (hydrophilic–lipophilic balance) system. Examples of the main types include glycol and glycerol esters, macrogol ethers and esters, sorbitan esters and polysorbates. The type of emulsion formed depends on the balance between hydrophilic and lipophilic groups which is expressed as the HLB (hydrophilic–lipophilic balance) number (see below). The non-ionic surfactants are compatible with both anionic and cationic substances and are highly resistant to pH change. They are used to produce either o/w or w/o emulsions for both external and internal use. These are synthetic materials and make up the largest group of surfactants. Examples include cetrimide and benzalkonium chloride. The cationic surfactants also have antimicrobial activity. Emulsions formed by a cationic surfactant are generally stable at acidic pH. They are used in the preparation of o/w emulsions for external use and must be in their ionized form to be effective. ![]() These are usually quaternary ammonium compounds which have a surface-active cation and so are sensitive to anionic surfactants and drugs. Soaps of divalent and trivalent metals such as calcium oleate (w/o) (see Example 35.3)Īmine soaps such as triethanolamine oleate (o/w)Īlkyl sulphates such as sodium lauryl sulphate (o/w).Ĭationic surfactants. After reading this article “Cold cream is which type of emulsion” you may also read: Cold Cream: History, Formula, Method, Uses, Evaluation to know details about cold cream.Alkali metal and ammonium soaps such as sodium stearate (o/w) Ĭonclusion: Simple answer to the question “Cold cream is which type of emulsion” is Water in Oil (W/O) emulsion. Wivell, Clear cold cream cosmetic compositions, United States Patent. Philadelphia: Lippincott Williams & Wilkins 2005. Remington: The Science and Practice of Pharmacy. Remington, Joseph P, and Paul Beringer.Question: Cold cream is which type of emulsion?Īnswer: Water in Oil (W/O) emulsion, in another word, Cold cream is an oil-based semisolid preparation. You may able to answer the following question shortly Microbiological Examination of cold cream: most important test for all types of semisolid preparations. ![]() Uniformity of Dosage Unit (for medicated cold cream).Viscosity test: to predict spreadability.The following several tests may perform to evaluate the quality of a cold cream Poison vs Toxin, Side effect vs Toxic effect Formula of Beeswax-Borax type Traditional Cold Cream Name of Raw materialsĮmollient, Solvent and vehicles of an oil phase The Galen formula of cold cream has changed but little in proportions or method of preparation throughout many centuries. History of Cold Cream preparationĬold cream was first invented by Galen, a famous Greek physician- pharmacist in the Roman Empire (who practiced in Rome) of the 1 st Century AD. On the other hand, vanishing cream is used for summer or hot weather because vanishing cream does not contain a large portion of the oil phase. Besides, in cold cream, the major portion is the oil phase thus cold cream is used especially in cold weather or winter season. The name “cold cream” derives from the cooling feeling of the cream, when applied the water evaporates and creates a cooling sensation. Why cold cream is called cold cream?Īfter the application of cold cream, you may feel a cooling effect. You may also read: Emulsifying agents or Emulsifiers or EmulgentsĬold cream is an oil-based semisolid preparation.Ĭold cream is a water in oil (W/O) emulsion. Cream vs OintmentĬold Creams are white to off-white, viscous, relatively soft, consistently spreadable, semisolid water in oil emulsion in which an aqueous phase (internal/disperse/discontinuous phase) is dispersed in an oil phase (external /continuous phase) and the proportion of fatty and oil phase predominates in clod cream. Generally, it contains mineral oil, beeswax, borax, and water. Cold cream is also known as Unguentum or Ceratum Refrigerans. Simply the cold cream is an oil-based semisolid preparation. In cold cream, the major portion is the oil phase. When a water phase is dispersed in an oil phase, the emulsion is referred to as a water-in-oil (W/O) emulsion and oil is referred to as the continuous phase. Formula of Beeswax-Borax type Traditional Cold CreamĬold cream is a water in oil (W/O) emulsion, in the European Pharmacopoeia cold cream is described as Fatty Cream. ![]()
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